Starting-valve for internal-combustion engines.



der being form, this forked end HUGH EMILE FENGHELLE, 0F GENOA, ITALY, ASSIGNOR T0 WILLIAM L. KANN, OF

PITTSBURGH, PENNSYLVANIA, TRUSTEE.

STARTING-VALVE FOR INTERNAL-COMBUSTION EN GIN ,.ns..

Specification of Letters Patent.

Patented Feb. 11, 1919.

-Application Med December 6, 1917.4 Serial No. 205,889.

To all whom it may concern:

Be it known that I, HUGH Emma FEN- GHELLE, a British subject, residing at Via XX Settembre 34/4, Genoa, in the Kingdom of Italy, have invented certain new and use ful Improvements in Starting-Valves for Internal-Combustion Engines, of which the following is a specilication.

This invention relates yto air starting valves for internal ignition, and' has or its chief object to pro-x vide an automatically acting valve of thisf/ type which opens only when the pressure wlthin the cylinder is below that of the starting air supply so that there is no risk of the comgressed air or gases in the cylina aratus. .t

ceording to this invention the valve/stem slides within a sliding piston under the control of an interposed spring, the piston being displaceable betweena fixed stop and a stop on the valve stem, stop it is forced by the in air admitted to the ho d the valve closed until the piston is displaced b the engine startin mechanism to release tlie valve and allow rt to open and close automaticall in accordance with the relative pressures ofY the starting air and cylinder gases.

In order that the said invention may be' more clearly understood and readily carried into effect the same will be more fully described with reference to drawing, which shows in longitudinal .section an air Starting valve embodying this invention. f

A isl the valve stem with mushroom head a at the inner end and an adjustable 'stop nut a at the outer end. B is the displaceable piston' and C the valve casing within which the piston and valve slide. D is a piston operating lever with connection d through which 1t can be actuated by a cam on the distributing shaft so as 'to control the Spsition of the fiston B. For this purpose,

e short arm '-,of said lever iso forked being arranged to enle the collar b on the piston.

Ween the collar b on the upper end of the piston B and the nut a. on the end of the valve stem A is placed a spring a* which serves to hold the valve a resiliently u`pon pressure of the startvalve casing, so as to by the air pressure rthe valve hea I of the piston B. combustion en ines, esj pecially those employing a Diese type of;

V closed -by the riven back into the air supply ,Y

against which latter the accompanying its seating at the end of the valve casing and also to keep fthe piston B down yso that the iiange or sto b normally rests upon the upper end of t e casin C. A

n. Starting air eing a "itted to the valve chamber a through the ort ,a4 inthe casing the air ressure is exerted1 both upon d? a and upon the lityer` end The area of the lutter being greater than that of the valve the 'piston is driven upwardly by the excesspressure so as to compress the lspring at, the move ment continuing until the upper end of the piston extension b2 meets the under surface of the stop nut c on the valve stem. The valve in this position is therefore firmly held ressure of the air acting on the piston and) no startin air can escape into the cylinder. To rovide for the starting action the lever which is mounted upon the bracket E, is operated from the distributing shaft so as to press the piston B down against the pressure of the air in the chamber as. The iston is displaced until it reaches the position shown in the drawing, with the iiange b abutting against the upper end of the casing C. The valve is now free to open against the relatively small pressure of the spring a2 and to admit the starting air to the cylinder. If however, the pressure in the cylinder is greater than the starting air pressure the valve rcmains closed and only in the event of the cylinder pressure falling on expansion below the pressure of the starting air will the valve o en and admit Ithe air into the cylinder. T e valve is thus a balanced one and opens an`d closes in accordance with the relative ressures of the starting air and the cylm er ases.

en t e air in the valve casing is placed: to exhaust the valve is held upon its seat by the aforesaid spring a and thus serves at this time, as well as during `the time that the Starting airis in communication with the yalve casing, as,a check valve for preventing admission of the cylinder gases or airinto the valve casing andthe starting air channels. What I claim and desire to secure byLetters Patent of the United States is In apparatus of the character 'described, a casing having an air chamber provided'with a constantly open inlet, and with an outlet leading to `the cylinder, a valve rontrollinpr said outlet and exposed al; .all between the piston and valve and means for times to the cylinder pressure, in a seating displacing the piston against the pressure f direetion and to the pressure insaid elianibei the starting air so as to release the valve in an unseating direction, a piston slidably from piston control.

I mounted in said casing and also slidable on 4. In air starting apparatus for internal e the stem of the alve with one end theieot combustion engines, an automatic starting opposed to the said valve and exposed to valve coni risin a valve stern and a mushtlie air pressure in .said chamber, the piston rooin headJ, a va ve easing, a sliding piston and valve having eoi'ieratingstop portions, in the easing and exposed to the startingair and a spring interposed betweenthe piston pi'essure, a stop on the piston adapte and valve, and means. tor positively dis abut against the easing when the piston '1S placing tlie piston against the air pressure in normal ino erat'ive position, an adjustin said clianilier to thereby release the valve able stop on tie valve stein against which fi'oin the control of the piston. the piston is pressed by the pressure of the l5 2. vln air `starting apparatus for internal starting air, a spring between the piston and eoinlnistion engines, an autom-.uio air start valve and means for displacing the lpiston ing valve. a valve easing, a lsliding.pstonjn against the pressure of the starting air so the meineny sulijeeted to the press-tire o the as to release the valve Jfrom piston control.

, starting air. through wliieli piston the valve 5. An automatic air starting valve for in- '20 stein passes, a stop on the valve stein adapted ternal combustion engines, comprising a cyto meet the piston when the hitter is pressed l'indrieal easin havin a valve chamber at baek by tlu etiii'tingr air` a light spring beone end, a sli ing vagli'e stein with mushtweeii the valve and piston, maintaining the rooin head closing the said eharnber, a piston valve noi'niall closed and the pieton in inadapted to slide 1n theffasing and receiving operative position, and means. for displacing the slidingralve stein, the area'of the pist e i piston against the pressure of the air so ton exposed to' the pressure of starting air as to release the valve from piston control. in the valve chamber being greater than that 3. l'n air starting apparatus for internal of 'the valve surface exposed to sueheprescombustion engines, an automatic starting sure, a sto'p upon the outer end of the valve valve comprising a valve stem and a mush- ,stein against which stopv the piston aliuts on room head, a valve casing, a sliding piston the admission of stai-tin air to the valve in the casing and exposed to the starting air chamber, and means for splacinginhe pispressiirem an adjustable stop on the valve tn againstIl the pressure of the starting air.

stem agai st which the piston is pressed by R5 the pressure of the starting air, a spring HUGH EMILE FENCHELJE. 

